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2019 Trailboss 5.3l 8spd issues

TLDLTD

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TLDLTD Enthusiast

TLDLTD

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Started truck yesterday, idled down and put into gear. It clunked into drive, kind of like when you put it into geared when revving a bit.

 

Took off like I was in 2nd or 3rd and wouldn’t shift. Pulled over shut truck off and restarted and it works fine. All day yesterday running errands if it was parked more than 5 mins it would do it again. Shut off and restart and it’s normal - frustrating.

 

Anyone else? What was the cause/remedy?

 

It goes to the dealer soon for the brake recall issue that I have been dealing with since mid-December as well as regular maintenance so want to have back up info to make sure they address it.

 

 

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Donnie Summers Enthusiast

Donnie Summers

Posted
Posted

What was the build date of yur truck, Asking cuz after like 3/15/19 they put Moble1 fluid in the transmissions and Dexron IV and people with the Dexron are having issues, Although my truck the build is 7/13/19 and it was cold without letting it warm up a little it shifted hard from 1rst to 2nd but never an issues after that......

TLDLTD Enthusiast

TLDLTD

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Mine is a May build. Seems to me like a computer issue the way it acts. Going in Wednesday- will post update.


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Sir Dan Enthusiast

Sir Dan

Posted
Posted

Sounds like it's just a GM 8 speed doing GM 8 speed things. Horrible transmission in my opinion.

TLDLTD Enthusiast

TLDLTD

Posted
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Sounds like it's just a GM 8 speed doing GM 8 speed things. Horrible transmission in my opinion.

Hoping for the best. I was happy with it so hopefully it’s part of the computer problems that have been happening on my truck.


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TLDLTD Enthusiast

TLDLTD

Posted
  • Author
Posted

Started truck yesterday, idled down and put into gear. It clunked into drive, kind of like when you put it into geared when revving a bit.

 

Took off like I was in 2nd or 3rd and wouldn’t shift. Pulled over shut truck off and restarted and it works fine. All day yesterday running errands if it was parked more than 5 mins it would do it again. Shut off and restart and it’s normal - frustrating.

 

Anyone else? What was the cause/remedy?

 

It goes to the dealer soon for the brake recall issue that I have been dealing with since mid-December as well as regular maintenance so want to have back up info to make sure they address it.

 

 

Sent from my iPhone using Tapatalk

 

Well it is now stuck in 2nd or 3rd gear at all times. F@“&

 

On top of that had a different brake issue while driving today. Instead of the usual losing the power assist (recall programming issue) the brakes felt super spongey and easy to push. There was no brakes or full lock up. Nothing in between.

 

So driving 80km/hr at 3500rpm with sketchy brakes in a snow storm all the way home was nice.

 

It goes in tomorrow for a list of work.

 

 

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TLDLTD Enthusiast

TLDLTD

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Was just told it is catastrophic failure and that the transmission needs to be replaced.


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